# data[].attributes.body
Natural selection caused the birds beak size to increase

# data[].attributes.body
 The beaks size increased because when the birds population went from 751-90 birds.

# data[].attributes.body
 When the Porticala seeds decreased their offsprings beaks got larger.

# data[].attributes.body
The beak sizes  increased when the rainfall decreased to 20mm in 1977

# data[].attributes.body
The decrease in birds with small beaks allowed the bigger beaked birds to repopulate

# data[].attributes.body
Since there was less soft and smaller seeds (portulaca) where gone (0 per meters square) so the birds got bigger beaks to help open and eat the harder jagged seeds (tribulus) which were more common (5 per meter square) causing only the bigger beaked birds to reproduce.

# data[].attributes.body
When there was less water the beaks got bigger to help them get water from an area more easily.